1. Ubuntu Security Notices
  2. USN-4423-1

USN-4423-1: Firefox vulnerability

Publication date

14 July 2020

Overview

A X-Frame-Options bypass was discovered in Firefox.

Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

It was discovered that X-Frame-Options could be bypassed in some
circumstances. If a user were tricked in to opening a specially crafted
website, an attacker could potentially exploit this to conduct
clickjacking attacks.

It was discovered that X-Frame-Options could be bypassed in some
circumstances. If a user were tricked in to opening a specially crafted
website, an attacker could potentially exploit this to conduct
clickjacking attacks.

Update instructions

After a standard system update you need to restart Firefox to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.04 focal firefox –  78.0.2+build2-0ubuntu0.20.04.1
19.10 eoan firefox –  78.0.2+build2-0ubuntu0.19.10.1
18.04 bionic firefox –  78.0.2+build2-0ubuntu0.18.04.1
16.04 xenial firefox –  78.0.2+build2-0ubuntu0.16.04.1

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References

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